What Are Microplastics? Microplastics are any form of plastic under 5mm long. These plastics are often a co-product or byproduct of other larger plastics or compounds. They end up in rivers, oceans, and humans. We end up eating, inhaling, and using them ubiquitously. Sea animals end up eating them, which in turn end up in … Continue reading 11 Rules to the Modern Microplastics Mess